package com.itheima.common.utils;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.itheima.properties.AliOssProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;

// 只能用在IOC容器中的对象中
@Component
public class AliOSSUtils {

    // 拓展知识 默认值的策略
    // @Value("${ali.oss.endpoint}")
    // private String endpoint;
    //
    // @Value("${ali.oss.accessKeyId}")
    // private String accessKeyId;
    //
    // @Value("${ali.oss.accessKeySecret}")
    // private String accessKeySecret;
    //
    // @Value("${ali.oss.bucketName}")
    // private String bucketName;
    @Autowired
    private AliOssProperties aliOssProperties;

    /**
     * 实现上传图片到OSS
     */
    public String upload(MultipartFile multipartFile) throws IOException {
        String endpoint = aliOssProperties.getEndpoint();
        String accessKeyId = aliOssProperties.getAccessKeyId();
        String accessKeySecret = aliOssProperties.getAccessKeySecret();
        String bucketName = aliOssProperties.getBucketName();

        // 获取上传的文件的输入流
        InputStream inputStream = multipartFile.getInputStream();

        // 避免文件覆盖
        String originalFilename = multipartFile.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));

        // 上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        ossClient.putObject(bucketName, fileName, inputStream);

        // 文件访问路径
        String url = endpoint.split("//")[0] + "//" + bucketName + "." + endpoint.split("//")[1] + "/" + fileName;

        // 关闭ossClient
        ossClient.shutdown();
        return url;// 把上传到oss的路径返回
    }
}